+Karl G Posted February 7, 2021 Share Posted February 7, 2021 I've created a sample 4-player QuadTari game for bB using the standard kernel. My implementation uses a small code change to the standard kernel, which should be rolled into a future batari Basic release. Versions for the Multisprite kernel and the DPC+ kernel will be forthcoming. For now, to use this code, place the included std_kernel.asm file in your project directory. To enable the QuadTari code, dim a variable with the name qtcontroller, e.g.: dim qtcontroller=y This variable will be used to set which pair of controllers will be read on the next frame (after drawscreen). Note that only bit 0 of this variable is used, so the other 7 bite can be used in the project without being overwritten. By default, controllers 1 and 2 will be selected at the beginning of your game. To read from controllers 3 and 4, set the qtcontroller variable to 1, and then do a drawscreen. On the next frame, controllers 3 and 4 will be selected. To switch back to controllers 1 and 2, set the qtcontroller variable back to 0, and do a drawscreen. Note that if you are using the other bits of this variable for other purposes, you will instead want to set bit0 directly instead of setting the whole variable. To allow Stella to detect your game as a QuadTari game, you can include the following data statement: data quadtari_detection $1B, $1F, $0B, $0E, $1E, $0B, $1C, $13 end The included demo game "raindrops" also includes code to detect if the QuadTari hardware is detected (either present in Stella, or on real hardware). If it is not detected, the background color is turned to red. Let me know if you have any questions, or find any bugs in this code. Version 3 2/13/2021: bb-qt-stdkernel.zip raindrops.bin 7 1 Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 7, 2021 Author Share Posted February 7, 2021 Raindrops game description: You are a magical flying umbrella. Like all magical flying umbrellas, your goal is to avoid getting hit by raindrops, and capture purple things flying across the sky. If you get hit by a raindrop, you go back to your starting point. If you capture the purple thing, you gain a point. First player to 9 points wins the game. 3 Quote Link to comment Share on other sites More sharing options...
+ZeroPage Homebrew Posted February 7, 2021 Share Posted February 7, 2021 Awesome Karl! Another new game for the QuadTari! I've added it to the list for this Friday's QuadTari Special! ? - James 4 Quote Link to comment Share on other sites More sharing options...
+Gemintronic Posted February 8, 2021 Share Posted February 8, 2021 Thank you for the example! Really excited for the multi sprite kernel version. I know there isn't much CPU time in that.. but, all my QuadTari game designs revolve around it Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 8, 2021 Author Share Posted February 8, 2021 @Gemintronic - your wish is my command. This is the version for the Multisprite kernel. It is used the same way as the standard kernel version, except that it will be the modified multisprite_kernel.asm that you place in your project directory. The sample code shows an example of setting the active controllers using a single bit, and using another bit in the same variable for another purpose. This is also a demo of using the left side of the QuadTari, with a normal controller plugged into the right side for a 3-player game demo. The sample code is a simple game called Space Debris. You are in a piloting competition in a hazardous sector. You are competing against 2 other pilots to see who can demonstrate the best piloting skills. Avoid the space debris and asteroids flying towards your ship. Each hit reduces your shield strength by one. The last pilot with remaining shields wins. Version 3 (2/13/2021): bb-qt-multisprite.zip spacedebris.bin 3 1 Quote Link to comment Share on other sites More sharing options...
+Gemintronic Posted February 8, 2021 Share Posted February 8, 2021 I just compiled a 32k version of your multi sprite example and it works in Stella. Haven't tried the real console yet because impatience But, very promising! Big thanks to Karl G and Gauauu!! 1 Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 9, 2021 Author Share Posted February 9, 2021 And last but not least - here is the version for the DPC+ kernel, plus yet another game demo with sample code. I realized that the other two samples did not use the fire button, so this one makes use of it. Witch's Tower: Your tower is being attacked by multiple dragons! Dragons can only be defeated by the combined power of 4 witches controlling their wands remotely. To shoot a dragon, all 4 players must be aiming their wands the same direction AND all 4 players must be hitting the fire button. Version 2: bb-qt-DPCplus.zip witchtower.bin 2 1 Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 9, 2021 Author Share Posted February 9, 2021 Sounds were missing from the last upload, so I uploaded a new version to the last post. I also did a minor update to the "raindrops" game since I originally posted it. 1 Quote Link to comment Share on other sites More sharing options...
+ZeroPage Homebrew Posted February 12, 2021 Share Posted February 12, 2021 (edited) QUADTARI WORLD DEBUT! ZeroPage Homebrew will be playing the three QuadTari demo games Raindrops, Space Debris and Witch's Tower that use Nathan Tolbert's brand new four joystick adapter, the QuadTari on tomorrow's (Fri Feb 12, 2021) stream LIVE on Twitch at 6PM PT | 9PM ET | 2AM GMT! Hope everyone can watch! ZPH Twitch Stream: https://www.twitch.tv/zeropagehomebrew/ Games: QuadGames (2021 Exclusive WIP Premiere) by Nathan Tolbert @gauauu Modern Battle (2021 Exclusive WIP Premiere) by Marco Johannes @MarcoJ Raindrops (2021 WIP) by Karl Garrison @Karl G Space Debris (2021 WIP) by Karl Garrison @Karl G Witch's Tower (2021 WIP) by Karl Garrison @Karl G Galagon (2019 Retail) by John Champeau / Champ Games @johnnywc Wizard of Wor Arcade (2019 Retail) by John Champeau / Champ Games @johnnywc RobotWar: 2684 (2021 Exclusive WIP Update) by John Champeau / Champ Games @johnnywc Zoo Keeper (2020 Retail) by John Champeau / Champ Games @johnnywc Lady Bug Arcade (2021 Exclusive WIP Premiere) by John Champeau / Champ Games @johnnywc (SET VIDEO TO 1080P60 FOR FULL QUALITY) Edited February 15, 2021 by ZeroPage Homebrew 3 Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 12, 2021 Author Share Posted February 12, 2021 @ZeroPage Homebrew It's cool that you are including these on your show tomorrow. I hope that it's clear that these are quick and dirty proof-of-concept code, and not intended to be serious games. My family did seem to enjoy testing Raindrops, though. ? 1 Quote Link to comment Share on other sites More sharing options...
+ZeroPage Homebrew Posted February 12, 2021 Share Posted February 12, 2021 (edited) 4 minutes ago, Karl G said: @ZeroPage Homebrew It's cool that you are including these on your show tomorrow. I hope that it's clear that these are quick and dirty proof-of-concept code, and not intended to be serious games. My family did seem to enjoy testing Raindrops, though. ? Oh definitely, it's great that you've made these demos to show how people can start putting to use the QuadTari in batari Basic. I'm really looking forward to all the creative multiplayer games that will be coming out! - James Edited February 12, 2021 by ZeroPage Homebrew 2 Quote Link to comment Share on other sites More sharing options...
+sramirez2008 Posted February 12, 2021 Share Posted February 12, 2021 10 minutes ago, Karl G said: @ZeroPage Homebrew It's cool that you are including these on your show tomorrow. I hope that it's clear that these are quick and dirty proof-of-concept code, and not intended to be serious games. My family did seem to enjoy testing Raindrops, though. ? I'm looking forward to seeing them. My QuadTari is scheduled to arrive tomorrow. I won't have a chance to test it before the show. Too busy with work. 1 Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 12, 2021 Author Share Posted February 12, 2021 I have updated the Multisprite kernel demo to be 3 players instead of 4. This is so I have a demo where the QuadTari is only plugged into one controller port (left). A normal controller is plugged into the right controller port to make a 3-player game. It also gives each of the ships more room to maneuver. @ZeroPage Homebrew - if it's not too late, the new version of Space Debris might be better for the show tonight. 1 Quote Link to comment Share on other sites More sharing options...
+ZeroPage Homebrew Posted February 12, 2021 Share Posted February 12, 2021 6 minutes ago, Karl G said: I have updated the Multisprite kernel demo to be 3 players instead of 4. This is so I have a demo where the QuadTari is only plugged into one controller port (left). A normal controller is plugged into the right controller port to make a 3-player game. It also gives each of the ships more room to maneuver. @ZeroPage Homebrew - if it's not too late, the new version of Space Debris might be better for the show tonight. Thanks for the heads up Karl! I'll download the new version for tonight. ? - James Quote Link to comment Share on other sites More sharing options...
+sramirez2008 Posted February 12, 2021 Share Posted February 12, 2021 14 minutes ago, Karl G said: I have updated the Multisprite kernel demo to be 3 players instead of 4. This is so I have a demo where the QuadTari is only plugged into one controller port (left). A normal controller is plugged into the right controller port to make a 3-player game. It also gives each of the ships more room to maneuver. @ZeroPage Homebrew - if it's not too late, the new version of Space Debris might be better for the show tonight. I really need to your games. -Thanks.? Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 13, 2021 Author Share Posted February 13, 2021 I've updated the Space Debris demo above based on issues identified in the ZPH stream: 4th player score is no longer visible Immortality bug has been fixed Increased X-axis mobility for Tanya 3 Quote Link to comment Share on other sites More sharing options...
+Karl G Posted February 13, 2021 Author Share Posted February 13, 2021 I've updated Raindrops demo above to add the following: Left difficulty A: faster drops Right Difficulty A: more raindrops 3 Quote Link to comment Share on other sites More sharing options...
+ZeroPage Homebrew Posted February 14, 2021 Share Posted February 14, 2021 8 hours ago, Karl G said: I've updated the Space Debris demo above based on issues identified in the ZPH stream: 4th player score is no longer visible Immortality bug has been fixed Increased X-axis mobility for Tanya The extra room to move is great, Tanya says thank you! ? - James 1 Quote Link to comment Share on other sites More sharing options...
KevKelley Posted June 18, 2021 Share Posted June 18, 2021 Just curious... Is it difficult to modify this code to accommodate 8 players via paddle? I was looking at making a simple little program that really just needs to put a fire button in 8 different people's hands. I had considered just using two joysticks and using the directions on each joystick but didn't know how possible something like this would be with a quadtari in bB. Quote Link to comment Share on other sites More sharing options...
+Karl G Posted June 18, 2021 Author Share Posted June 18, 2021 1 hour ago, KevKelley said: Just curious... Is it difficult to modify this code to accommodate 8 players via paddle? I was looking at making a simple little program that really just needs to put a fire button in 8 different people's hands. I had considered just using two joysticks and using the directions on each joystick but didn't know how possible something like this would be with a quadtari in bB. Not difficult at all, really. In this case, we are ignoring the paddle part of the paddles, and just reading the fire buttons, so you wouldn't even need the "readpaddle" kernel option. Normally, joy0left maps to the paddle0 button, joy0right maps to the paddle1 button, joy1left to the paddle2 button, and joy1right to the paddle3 button. With the quadtari and my modified kernel (which should be rolled into the next bB release, on frames where qtcontroller is set to 1, you could read the other 4 paddle buttons from the other sets of paddle controllers in the same manner. 1 Quote Link to comment Share on other sites More sharing options...
KevKelley Posted June 18, 2021 Share Posted June 18, 2021 If I understand correctly, So does that mean on alternating frames you would read either buttons 1-4 or buttons 5-8 from joy0 and joy1 left and right? Quote Link to comment Share on other sites More sharing options...
+Karl G Posted June 18, 2021 Author Share Posted June 18, 2021 21 minutes ago, KevKelley said: If I understand correctly, So does that mean on alternating frames you would read either buttons 1-4 or buttons 5-8 from joy0 and joy1 left and right? Yes, that's exactly it. 1 Quote Link to comment Share on other sites More sharing options...
KevKelley Posted June 18, 2021 Share Posted June 18, 2021 Thank you! This beats me making single button buzzers... Although not totally out of the question. Lol Quote Link to comment Share on other sites More sharing options...
KevKelley Posted June 18, 2021 Share Posted June 18, 2021 (edited) How exactly are the paddles labeled in bB for 8 different paddles? Or when qtcontroller =1 it knows with the kernel what joy0left and the other directions mean? Edited June 18, 2021 by KevKelley Quote Link to comment Share on other sites More sharing options...
+Karl G Posted June 19, 2021 Author Share Posted June 19, 2021 3 hours ago, KevKelley said: How exactly are the paddles labeled in bB for 8 different paddles? Or when qtcontroller =1 it knows with the kernel what joy0left and the other directions mean? Yeah; I had wanted to have aliases setup for joy2 and joy3, but there's not an easy way to do that. If you set qtcontroller to 1, then after the next drawscreen, joy0 will be joy2, and joy1 will be joy3. Then you can set it back to 0, and on the next drawscreen it will be back to the first sets of controllers again. Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.